Objectives for sharing parmlib

In a multisystem environment, your objective should be to share one parmlib concatenation with as many systems as possible.
  • Examine your installation configuration and determine the best way to consolidate all LOADxx information for all MVS™ images in a sysplex into one LOADxx member using the HWNAME, LPARNAME and VMUSERID parameters. The LOADxx parameters HWNAME, LPARNAME and VMUSERID provide segmentation of the processor hardware name, the logical partition name and the VM Userid. For more information about filter parameters, see LOADxx (system configuration data sets).
  • Determine how many members of parmlib you can share with other systems. For example, if two systems use different CLOCKxx members, and only one value in each member is different, chances are that the two systems can share one CLOCKxx member.
  • If you cannot share members, determine if you can share system parameter definitions in one IEASYSxx member. For example, if you must use separate CLOCKxx members for two different systems, you can code the CLOCK=xx parameter in a shared IEASYSxx member that specifies the unique CLOCKxx member for each system.

System symbols are the elements that represent unique values in shared members. When determining which members are to be shared, you must consider which system symbols are available to you, the values of those system symbols, and how you can use them to optimize the sharing of parmlib.

The following sections explain how to use system symbols and plan for parmlib sharing.

Parent topic: Sharing parmlib definitions